Date: Tue, 28 Feb 2006 10:05:51 -0500 From: James Bailie <jimmy@jamesbailie.com> To: Glenn Dawson <glenn@antimatter.net> Cc: questions@freebsd.org Subject: Re: script(1) > Why does it output in CR/LF? Message-ID: <440466CF.2000007@jamesbailie.com> In-Reply-To: <7.0.1.0.2.20060228025256.039d9f68@antimatter.net> References: <7.0.1.0.2.20060228112857.0035f998@broadpark.no> <7.0.1.0.2.20060228025256.039d9f68@antimatter.net>
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Glenn Dawson wrote: > At 02:30 AM 2/28/2006, Kristian Vaaf wrote: > >> Hello. >> >> I am just curious why the files I generate with script(1) output in CR/LF >> forcing me to run dos2unix on them everytime? > > > Script just captures the output of your shell, and your shell has to > send crlf in order to get the cursor back to the beginning of a line. No it doesn't. The script(1) utility interposes a pseudo-terminal between the program whose output is to be captured and itself, so the program thinks its running on a terminal device and behaves accordingly. Then script(1) acts like a transparent filter, shuttling data back-and-forth from the actual terminal to the pseudo-terminal, while sending a copy of the program's output to the log file as well. It is the terminal driver in canonical mode, "inside" the pseudo-terminal, that is expanding NLs in the proggy's output stream into CRNL pairs. -- James Bailie <jimmy@jamesbailie.com> http://www.jamesbailie.com
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